Mechanical properties of modified epoxies as related to free volume parameters

Altaweel, Abdullah M. A. M. and Ranganathaiah, C. and Kothandaraman, B. (2009) Mechanical properties of modified epoxies as related to free volume parameters. Journal of Adhesion, 85 (4-5). pp. 200-215. ISSN 1545-5823

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Epoxy resins need modifications by rubbery additives, fillers, etc. for enhancement of their usage in various applications. This study aims to determine the mechanical properties of silicone (i.e., amine-containing poly dimethyl siloxane)-modified resins in combinations with fly ash. The mechanical properties, especially tensile/flexural strength and moduli, were determined. Amine-containing silicone (ACS) was found to weaken the epoxy resin. However, ACS-modified epoxy resin was found to tolerate the addition of a small amount of fly ash filler as it had better tensile and flexural strengths compared with the unfilled, modified resin. In contrast to this, the unmodified resin was found to have its tensile and flexural strengths deteriorated by the filler. The reason for this behaviour was speculated to be due to the ACS acting as an additional coupling agent between the resin and the filler. These properties were sought to be correlated with free volume parameters measured from Positron Annihilation Lifetime Spectroscopy. Free volume measurements appear to indicate enhanced epoxy-fly ash interactions by ACS. Scanning Electron Microscopy indicates better filler distribution in the ACS-modified resin compared with the unmodified resin.

Item Type: Article
Additional Information: 2nd International Conference on Advanced Computational Engineering and Experimenting, Barcelona, SPAIN, JUL 14-15, 2008
Uncontrolled Keywords: Amine-containing silicone polymer; Epoxy resin; Fly ash-filled epoxy resin; Free volume measurements; Positron annihilation lifetime spectroscopy; Silicone-modified epoxy resin
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Users 19 not found.
Date Deposited: 29 Aug 2019 10:27
Last Modified: 09 May 2023 03:30

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